package com.atguigu.gulimall.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.gulimall.auth.feign.ThirdPartyFeignService;
import com.atguigu.gulimall.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.gulimall.auth.vo.UserRegisterVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.support.DefaultMessageSourceResolvable;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import javax.validation.constraints.NotEmpty;
import java.util.HashMap;
import java.util.Map;
import java.util.PriorityQueue;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author phil
 * @create 2022-01-11 17:00
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartyFeignService thirdPartyFeignService;
    @Autowired
    StringRedisTemplate redisTemplate;
    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone) {
        //1、接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000){
                //60秒内不能重发
                return R.error(1,"获取短信频率太快请稍后再试");
            }
        }
        //2、验证码的再次校验。redis 存 sms:code phone -> code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code+ "_"+System.currentTimeMillis();
        //redis缓存验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone, subString,10, TimeUnit.MINUTES);

        thirdPartyFeignService.sendCode(phone,code);
        return R.ok();
    }
    /**
     *
     * TODO: 重定向携带数据：利用session原理，将数据放在session中。
     * TODO:只要跳转到下一个页面取出这个数据以后，session里面的数据就会删掉
     * TODO：分布下session问题
     * RedirectAttributes：重定向也可以保留数据，不会丢失
     * 用户注册
     * @return
     */
    @PostMapping("/register")
    public String register(@Valid UserRegisterVo vo, BindingResult result, RedirectAttributes attributes){
        //有错误就返回注册页
        if(result.hasErrors()){
            Map<String, String> errors = result.getFieldErrors().stream().
                    collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            attributes.addFlashAttribute("errors",errors);
            //效验出错回到注册页面
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            String redisCode = s.split("_")[0];
            if(code.equals(redisCode)){
                //验证码正确，删除缓存，令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过，真正注册，调用远程服务member，注册用户
                R r = memberFeignService.register(vo);
                if(r.getCode() == 0){
                    //注册成功，跳转到登录页面
                    return "forward:http://auth.gulimall.com/login.html";
                }else{
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg",new TypeReference<String>(){}));
                    attributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else{
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                System.out.println("验证码错误1");
                attributes.addFlashAttribute("errors",errors);
                //验证码错误，回到注册页面
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            System.out.println("验证码错误2");
            attributes.addFlashAttribute("errors",errors);
            //验证码错误，回到注册页面
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //注册成功，跳转到登录页面
//        return "forward:http://auth.gulimall.com/login.html";
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes attributes, HttpSession session){

        //远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode() == 0){
            //登录成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {});
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>(){}));
            attributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }

    @GetMapping(value = "/login.html")
    public String loginPage(HttpSession session) {

        //从session先取出来用户的信息，判断用户是否已经登录过了
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        //如果用户没登录那就跳转到登录页面
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }

    }


}
